Cartridge cut-out



Apri 1, 1930. T. LANG l A 1352,955

` CARTRIDGE CUT-OUT Filed Aug. '7.v 1925 2 Sheets-Sheet 1 C Fig/l.

/n fen for April 1930. T. LANG 15,752,955

' CARTRIDGE GUT-DUT Filed Aug. '7. 1925 2 Sheecs-*Sheet 2 fill gw 25 i lll f-r' f Patented Apr. 1,' 1930 UNITED STATES PAT-ENT oFFlca THEO LANG, F MUNICH, GERMANY, ASSIGNOR TO THE FIRM HASERINKL ,UHREN- UND APPARATEFABRIX G. M. B. H., OF AUGSBURG, BAVARIA, GERMANY CARTRIDGE CUT-OUT 4Application led August 7, 1925,-Seria1 No. 48,828, and in Germany August 11, 1924.

Thisinvention is a fuse plug and automatic cut-out having the form of a standard cartridge fuse. s the essential feature lof the e invention, the cartridge to'be inserted is constructed as a permanent safety cut-out. A heating wire is wound around an insulating ring and insulating piece in such a manner that it depresses a hook-shaped spring, and the latter locks a contact bolt in the contact position. y

Two embodiments of the invention. are shown by way ofexample, in the accompanydrawingsin which 1n Figs. 1 to 4 illustrate one construction, the` cartridge being shown in Figs. ,1. and 2 in longitudinal section online A--B of Fig. 4 in the position ready for use and in the inoperative position respectively.

. Fig. 3 is a cross section on line C-D of Fig. 1.

Fig. 4 is a cross section on line E-F ofA Fig. Figs. 5 to 9 illustrate 'a second construction, the .cartridge'being shown in Figs. 5 and 6 in longitudinal section respectively in the position ready for use andA in the inoperative position.

Fig. 7 is a side elevation, the envelope being partly broken oii. l

Figs. 8 and 9' are cross sections on linesl G-H of Fig. 5 and J--A-K of Fig. 6 respectively.

The casing 1 of the cartridge for cut-outs is made, as usual, of porcelain or of any other insulating material and carries on one end face a contact plug 2 and on the other end face a contact cap 3.7 -The contact plug 2 is hollow and a spring Las well as a stud 5, controlled byk said sprung, are located in the hollow plug. A contact bolt 6 guided by a contact ring 7 fixed in the casing 1 is movably mounted in. the casing 1` so that 'it bears against said stud 5. An insulating ring 8 fixed on the one surface of the contact rin 7 accommodates in an axial @groove 9 a locklng spring lOxed on the contact ring 7 by a screw 11. This spring 10 is maintained under tension by a heating wire 13, throughthe intermediary of a presvsure body 12 located in the groove 9 of the in- Wire being e insulating One end of lthe heating wire 13 is secured to thecontact ring 7 by means of a bar 21 and the other end is secured to a bar 22 which is in turn connected to the cap 3. The locking'spring 10 cooperateswith a cut-out portion 14of a disk 15 mounted on the contact bolt :6I Between disk 15 and contact ring 7 a pressure spring 16 is inserted which is wound around the contact bolt 6. Y

In the longitudinal bores of the rings 7, 8 a pin 17 is rotatably mounted which carries at one end a sickle-shaped disk 18 serving as spark extinguisher. `The other end of pin 17v is .connected with a twisted bar 19, said bar 'projecting through af rectangular slot 26,91

the disk 15 of contactbolt 6.

The opera-tion. of "the cut-out is as follows K The current Hows from contact stud v2 through contact stud 5, contact bolt 6, contact ring 7 a contact bar 21, heating wire 13 and a contact bar 22 to the contact cap 3 (Fig. 1). When short circuiting occurs-or when the cut-out is overloaded in any other manner, the

heatingcwire 13 is heated and expands, so that itv no longer ho'lds the spring 10 under the same tension as before. Thelocking spring 10 therefore releases the disk 15 of contact bolt 6. The bolt 6 moves toward the contact cap 3 under the action of spring 16 so that a gapfis produced between the corresponding end of contact bolt 6 and stud 5. The electricity conductin connection between stud2 and contact cap 1s interrupted (Fig. 2).

'At the same time as the contact bolt 6 moves its disk 15 moves over the twisted bar 19 and turns this bar and the pin 17 on the same in such a manner that the disk 18 fixed on pin 17 is inserted between the contact bolt 6 and the Acontact stud 5 and extinguishes any spark and prevents the current passing from contactstud 5 to contact bolt 6 (Fig. 2).

When' the several elements of the cut-out have to be returned into their operative position, it is only necessary to move the contact bolt 6 by hand or with the aidof any convenient instrument `in opposite direction so that the cut-out portion 14 of its ring 15 grips tact bolt 6, the bar 19, its pin 17 and disk 13 have been rotatedin opposite direction so that the contact bolt 6 bears against the contact stud 5.' i

:The safety cartridge according to thesecond form of construction shown in Figs. 5 to 9 comprises also an insulating casingsl, contact plug 2, Contact cap 3, spring 4, stud 5 and Contact bolt 6. r1`his contact bolt 6 is guided in a tube 23 fixed u on a plate 24 of insulating material carried by cap 3. Un the other end of tube 23 a metal disk 25 is fixed. Underneath disk 25 a ring`26 of insulating material is liXed on the tube 23.. A spiral spring 27 wound around tube 23 bears with its upper end against' ring 26 and with its lower end against a cross pin 29 movably guided in longitudinal slots 280i tube 23 and fixed inthe Contact bolt 6, so that the spring 27 has the tendency to permanently r 1 u serted in the main circuit ano, controiling said push the contact holt 6 towards the contact cap 3. A spring 30, located in a longitudinal groove of the insulating body 26 has at its lower end a locking hook31 which co-operates with one end of a cross pin 29 fixed on,

Contact bolt 6, the .upper end of said spring being liked on the disk 25 or tube 23 by means of a screw 32. r1he spring 30 is put under tension in the insulating body 26 with the aid of aninsulating piece 33 by a heating wire 34 wound several times around the insulating body 26, one end of said wire being electrically connected with the metalV disk 25 and its other end being electrically connected with' a bar 36 fixed by arscrew 35 on the insulating body 26. rlhe free end oi' bar 36 bears against the metal cap 3 of the insulating casing 1 so that the electric connection with said'cap is established.

1n a longitudinal bore of disk 25/and of the insulating 'body 26 a pin 37 is rotatably mounted which carries at "the upper end a disk 33 serving as spark extinguisher and which is connected at the lower end with a twisted bar 39 having a rlongitudinal slot 40 with which engages the other end of cross pin 29 ixed'in contact bolt 6.

w rlhe operation of the cut-out shown iii Figs.

5 to 9 is similar tothat of the cut-out shown in Figs. 1 to 4. The current flows from con-V tact plug 2 through stud 5, boltV 6, tube 23, metal disk 25, heating wire 34 and metal bar 36 to contact cap 3.

When short circuiting occurs or the cut-out 1s otherwise over-loaded, the heatingwire 34 isheated so that it expands and permits the, f"

spring which is under tension to move outwardly, and until the hook thereof releases the cross bolt 29 of spring controlled contact bolt 6. The bolt 6 is'moved by the aetiQnfof spring 27 towards the Contact cap The electric connection between Contact plu 2 and contact cap 3 is thus interrupted. he spark extinguisher 38 is rotated by means of the twisted bar 39in the slot 40 of which the cross pin 29 of contact bolt 6 slides. rhe several elements are brought iito the operative positions by a pressure exerted upon bolt 6 by hand or by means of a needle.

l claim: I

1. A cartridge having contacts at opposite ends thereof and a cut-out therein including a spring actuated contact bolt, a sprin actuated locking hook for securing said olt in contact position, a block of insulating material in which said Contact bolt is guided, and a heating wire wound around said block of insulating material and controlling said, locking hook.

' 2. cartrldge having contacts at opposite ends thereof, a spring controlled Contact bolt in said cartridge, a spring controlled locking hook 'for securing said bolt in Contact position, an insulation member in which said contact bolt is guided, and a heating wire inlocking hook, said wire being wound around said insulation member.

3. A cartridge having a pair relatively movable Contact members,a block ci insulating material within which one oit said members is slidable, a spring normally 'tending to separate said members, a hook for normally lso preventing said separating movement, and' a heatingwire wound around said block or" insulating material and normally holding said hook in operative position, said wire being connected in circuit and expanding to release said hook upon excessive dow oi' current.

A cartridge having a permanent cut-out` therein, including a longitudinally slidable contact member. a block of insulating material for guiding said member, a spring normally tending to push said member to open circuit position; a hook for preventing such movement, and a heating wire having one end connected to said contact member, and the other end to the end of-said cartridge.

said wire being wound around said block bf i insulating material vand normally holding engagement, a disk pivoted to swing inl a plane at right angles to the direction of movement of ,the contact bolt, and a member connectedto said contact bolt and having lost motion connectionswith said disk for swinging the latter upon the endwise movement of said bolt.

6. A. cartridge for cut-outs which is constructed as permanent safety device comprising a springcontrolled contact bolt, a cross i 20 positeends thereof, a movable circuit pin on said contact bolt, a metal tube enclosing said contact bolt and having longitudinal slots with which said cross pin of said contact bolt engages, and an oscillatory circuit breaking member operatively connected to said cross pin.

7. A cut-out device comprisin a'tubular insulating casing, a longitudinal yV movable circuit breaking member normally tending o to move to open circuit position a catch within said casing, and normally holding sald memberin closed circuit position, and movable radially of the casing to relasesaid member, and a coil-sof wire nor ally in circuit and normally holding said ca ch in operative-position, said coil being expansible when heated, to release said catch.

8. A cut-out vdevice comprising a tubular insulating casing, terminal members at 0p- 1 rea lng member, a spring. catch extending lengthwise of said casing within the latter and normally holding said member in closed circuit position, and a wire wound helically within said casing and normally holding said catch in operative position, said wire being cxpansible radially to release said catch when heated by excess current.

9. A cut-out device including a tubular inn 3o sulating casing, an annular insulation member disposed therein, a contact member movable longitudinally through said insulation member, a spring catch extending lengtlfwise of said insulation member upon the exterior thereof, and normally holding said contact member in closed circuit positin, a coil encircling said insulation member and insulated I v :from said spring catch and normally holding the latter in operative position, said coil bew `ing expansible When"heated to release said spring catch.

10. A cut-out device comprising a tubular insulating casing, a `contact member movable longitudinally thereof, a disk carried by a5 said member,.a spark arrester movable transversely of the path of movement of said contact member, and an oscillating support for saidspark arrester said sup ort ha'ving engagement with said disk an adapted to be rotated upon the longitudinal movement of the disk with said contact member.

il. A cut-out device comprising a tubular' insulating casing, a circuit breaking member disposed therein, a springcatch for normally holding said member in closedcircuit position, and a coil of Wire insulated from said catch but normally holding the latter in operative position, said coil being expansible when heated to permit swinging moveeo ment of said cat-ch and the release of said contactmember.

ln testimony whereof I ai'ix m signature.

THE LANG. 

